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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "arm920t.h"
  25 #include "jtag.h"
  26 #include "log.h"
  27
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #if 0
  32 #define _DEBUG_INSTRUCTION_EXECUTION_
  33 #endif
  34
  35 /* cli handling */
  36 int arm920t_register_commands(struct command_context_s *cmd_ctx);
  37
  38 int arm920t_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  39 int arm920t_handle_cp15i_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  40 int arm920t_handle_virt2phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  41 int arm920t_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  42 int arm920t_handle_md_phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  43 int arm920t_handle_mw_phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  44
  45 int arm920t_handle_read_cache_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  46 int arm920t_handle_read_mmu_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  47
  48 /* forward declarations */
  49 int arm920t_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
  50 int arm920t_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  51 int arm920t_quit();
  52 int arm920t_arch_state(struct target_s *target, char *buf, int buf_size);
  53 int arm920t_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
  54 int arm920t_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
  55 int arm920t_soft_reset_halt(struct target_s *target);
  56
  57 #define ARM920T_CP15_PHYS_ADDR(x, y, z) ((x << 5) | (y << 1) << (z))
  58
  59 target_type_t arm920t_target =
  60 {
  61         .name = "arm920t",
  62
  63         .poll = arm7_9_poll,
  64         .arch_state = arm920t_arch_state,
  65
  66         .halt = arm7_9_halt,
  67         .resume = arm7_9_resume,
  68         .step = arm7_9_step,
  69
  70         .assert_reset = arm7_9_assert_reset,
  71         .deassert_reset = arm7_9_deassert_reset,
  72         .soft_reset_halt = arm920t_soft_reset_halt,
  73
  74         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  75
  76         .read_memory = arm920t_read_memory,
  77         .write_memory = arm920t_write_memory,
  78         .bulk_write_memory = arm7_9_bulk_write_memory,
  79
  80         .run_algorithm = armv4_5_run_algorithm,
  81
  82         .add_breakpoint = arm7_9_add_breakpoint,
  83         .remove_breakpoint = arm7_9_remove_breakpoint,
  84         .add_watchpoint = arm7_9_add_watchpoint,
  85         .remove_watchpoint = arm7_9_remove_watchpoint,
  86
  87         .register_commands = arm920t_register_commands,
  88         .target_command = arm920t_target_command,
  89         .init_target = arm920t_init_target,
  90         .quit = arm920t_quit
  91 };
  92
  93 int arm920t_read_cp15_physical(target_t *target, int reg_addr, u32 *value)
  94 {
  95         armv4_5_common_t *armv4_5 = target->arch_info;
  96         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
  97         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
  98         scan_field_t fields[4];
  99         u8 access_type_buf = 1;
 100         u8 reg_addr_buf = reg_addr & 0x3f;
 101         u8 nr_w_buf = 0;
 102
 103         jtag_add_end_state(TAP_RTI);
 104         arm_jtag_scann(jtag_info, 0xf);
 105         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr);
 106
 107         fields[0].device = jtag_info->chain_pos;
 108         fields[0].num_bits = 1;
 109         fields[0].out_value = &access_type_buf;
 110         fields[0].out_mask = NULL;
 111         fields[0].in_value = NULL;
 112         fields[0].in_check_value = NULL;
 113         fields[0].in_check_mask = NULL;
 114         fields[0].in_handler = NULL;
 115         fields[0].in_handler_priv = NULL;
 116
 117         fields[1].device = jtag_info->chain_pos;
 118         fields[1].num_bits = 32;
 119         fields[1].out_value = NULL;
 120         fields[1].out_mask = NULL;
 121         fields[1].in_value = NULL;
 122         fields[1].in_check_value = NULL;
 123         fields[1].in_check_mask = NULL;
 124         fields[1].in_handler = NULL;
 125         fields[1].in_handler_priv = NULL;
 126
 127         fields[2].device = jtag_info->chain_pos;
 128         fields[2].num_bits = 6;
 129         fields[2].out_value = &reg_addr_buf;
 130         fields[2].out_mask = NULL;
 131         fields[2].in_value = NULL;
 132         fields[2].in_check_value = NULL;
 133         fields[2].in_check_mask = NULL;
 134         fields[2].in_handler = NULL;
 135         fields[2].in_handler_priv = NULL;
 136
 137         fields[3].device = jtag_info->chain_pos;
 138         fields[3].num_bits = 1;
 139         fields[3].out_value = &nr_w_buf;
 140         fields[3].out_mask = NULL;
 141         fields[3].in_value = NULL;
 142         fields[3].in_check_value = NULL;
 143         fields[3].in_check_mask = NULL;
 144         fields[3].in_handler = NULL;
 145         fields[3].in_handler_priv = NULL;
 146
 147         jtag_add_dr_scan(4, fields, -1);
 148
 149         fields[1].in_handler_priv = value;
 150         fields[1].in_handler = arm_jtag_buf_to_u32;
 151
 152         jtag_add_dr_scan(4, fields, -1);
 153
 154 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 155         jtag_execute_queue();
 156         DEBUG("addr: 0x%x value: %8.8x", reg_addr, *value);
 157 #endif
 158
 159         return ERROR_OK;
 160 }
 161
 162 int arm920t_write_cp15_physical(target_t *target, int reg_addr, u32 value)
 163 {
 164         armv4_5_common_t *armv4_5 = target->arch_info;
 165         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 166         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 167         scan_field_t fields[4];
 168         u8 access_type_buf = 1;
 169         u8 reg_addr_buf = reg_addr & 0x3f;
 170         u8 nr_w_buf = 1;
 171         u8 value_buf[4];
 172
 173         buf_set_u32(value_buf, 0, 32, value);
 174
 175         jtag_add_end_state(TAP_RTI);
 176         arm_jtag_scann(jtag_info, 0xf);
 177         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr);
 178
 179         fields[0].device = jtag_info->chain_pos;
 180         fields[0].num_bits = 1;
 181         fields[0].out_value = &access_type_buf;
 182         fields[0].out_mask = NULL;
 183         fields[0].in_value = NULL;
 184         fields[0].in_check_value = NULL;
 185         fields[0].in_check_mask = NULL;
 186         fields[0].in_handler = NULL;
 187         fields[0].in_handler_priv = NULL;
 188
 189         fields[1].device = jtag_info->chain_pos;
 190         fields[1].num_bits = 32;
 191         fields[1].out_value = value_buf;
 192         fields[1].out_mask = NULL;
 193         fields[1].in_value = NULL;
 194         fields[1].in_check_value = NULL;
 195         fields[1].in_check_mask = NULL;
 196         fields[1].in_handler = NULL;
 197         fields[1].in_handler_priv = NULL;
 198
 199         fields[2].device = jtag_info->chain_pos;
 200         fields[2].num_bits = 6;
 201         fields[2].out_value = &reg_addr_buf;
 202         fields[2].out_mask = NULL;
 203         fields[2].in_value = NULL;
 204         fields[2].in_check_value = NULL;
 205         fields[2].in_check_mask = NULL;
 206         fields[2].in_handler = NULL;
 207         fields[2].in_handler_priv = NULL;
 208
 209         fields[3].device = jtag_info->chain_pos;
 210         fields[3].num_bits = 1;
 211         fields[3].out_value = &nr_w_buf;
 212         fields[3].out_mask = NULL;
 213         fields[3].in_value = NULL;
 214         fields[3].in_check_value = NULL;
 215         fields[3].in_check_mask = NULL;
 216         fields[3].in_handler = NULL;
 217         fields[3].in_handler_priv = NULL;
 218
 219         jtag_add_dr_scan(4, fields, -1);
 220
 221 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 222         DEBUG("addr: 0x%x value: %8.8x", reg_addr, value);
 223 #endif
 224
 225         return ERROR_OK;
 226 }
 227
 228 int arm920t_execute_cp15(target_t *target, u32 cp15_opcode, u32 arm_opcode)
 229 {
 230         armv4_5_common_t *armv4_5 = target->arch_info;
 231         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 232         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 233         scan_field_t fields[4];
 234         u8 access_type_buf = 0;         /* interpreted access */
 235         u8 reg_addr_buf = 0x0;
 236         u8 nr_w_buf = 0;
 237         u8 cp15_opcode_buf[4];
 238
 239         jtag_add_end_state(TAP_RTI);
 240         arm_jtag_scann(jtag_info, 0xf);
 241         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr);
 242
 243         buf_set_u32(cp15_opcode_buf, 0, 32, cp15_opcode);
 244
 245         fields[0].device = jtag_info->chain_pos;
 246         fields[0].num_bits = 1;
 247         fields[0].out_value = &access_type_buf;
 248         fields[0].out_mask = NULL;
 249         fields[0].in_value = NULL;
 250         fields[0].in_check_value = NULL;
 251         fields[0].in_check_mask = NULL;
 252         fields[0].in_handler = NULL;
 253         fields[0].in_handler_priv = NULL;
 254
 255         fields[1].device = jtag_info->chain_pos;
 256         fields[1].num_bits = 32;
 257         fields[1].out_value = cp15_opcode_buf;
 258         fields[1].out_mask = NULL;
 259         fields[1].in_value = NULL;
 260         fields[1].in_check_value = NULL;
 261         fields[1].in_check_mask = NULL;
 262         fields[1].in_handler = NULL;
 263         fields[1].in_handler_priv = NULL;
 264
 265         fields[2].device = jtag_info->chain_pos;
 266         fields[2].num_bits = 6;
 267         fields[2].out_value = &reg_addr_buf;
 268         fields[2].out_mask = NULL;
 269         fields[2].in_value = NULL;
 270         fields[2].in_check_value = NULL;
 271         fields[2].in_check_mask = NULL;
 272         fields[2].in_handler = NULL;
 273         fields[2].in_handler_priv = NULL;
 274
 275         fields[3].device = jtag_info->chain_pos;
 276         fields[3].num_bits = 1;
 277         fields[3].out_value = &nr_w_buf;
 278         fields[3].out_mask = NULL;
 279         fields[3].in_value = NULL;
 280         fields[3].in_check_value = NULL;
 281         fields[3].in_check_mask = NULL;
 282         fields[3].in_handler = NULL;
 283         fields[3].in_handler_priv = NULL;
 284
 285         jtag_add_dr_scan(4, fields, -1);
 286
 287         arm9tdmi_clock_out(jtag_info, arm_opcode, 0, NULL, 0);
 288         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
 289         arm7_9_execute_sys_speed(target);
 290
 291         if (jtag_execute_queue() != ERROR_OK)
 292         {
 293                 ERROR("failed executing JTAG queue, exiting");
 294                 exit(-1);
 295         }
 296
 297         return ERROR_OK;
 298 }
 299
 300 int arm920t_read_cp15_interpreted(target_t *target, u32 cp15_opcode, u32 address, u32 *value)
 301 {
 302         armv4_5_common_t *armv4_5 = target->arch_info;
 303         u32* regs_p[1];
 304         u32 regs[2];
 305         u32 cp15c15 = 0x0;
 306
 307         /* load address into R1 */
 308         regs[1] = address;
 309         arm9tdmi_write_core_regs(target, 0x2, regs);
 310
 311         /* read-modify-write CP15 test state register
 312         * to enable interpreted access mode */
 313         arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
 314         jtag_execute_queue();
 315         cp15c15 |= 1;   /* set interpret mode */
 316         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 317
 318         /* execute CP15 instruction and ARM load (reading from coprocessor) */
 319         arm920t_execute_cp15(target, cp15_opcode, ARMV4_5_LDR(0, 1));
 320
 321         /* disable interpreted access mode */
 322         cp15c15 &= ~1U; /* clear interpret mode */
 323         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 324
 325         /* retrieve value from R0 */
 326         regs_p[0] = value;
 327         arm9tdmi_read_core_regs(target, 0x1, regs_p);
 328         jtag_execute_queue();
 329
 330 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 331         DEBUG("cp15_opcode: %8.8x, address: %8.8x, value: %8.8x", cp15_opcode, address, *value);
 332 #endif
 333
 334         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = 1;
 335         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 1).dirty = 1;
 336
 337         return ERROR_OK;
 338 }
 339
 340 int arm920t_write_cp15_interpreted(target_t *target, u32 cp15_opcode, u32 value, u32 address)
 341 {
 342         u32 cp15c15 = 0x0;
 343         armv4_5_common_t *armv4_5 = target->arch_info;
 344         u32 regs[2];
 345
 346         /* load value, address into R0, R1 */
 347         regs[0] = value;
 348         regs[1] = address;
 349         arm9tdmi_write_core_regs(target, 0x3, regs);
 350
 351         /* read-modify-write CP15 test state register
 352         * to enable interpreted access mode */
 353         arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
 354         jtag_execute_queue();
 355         cp15c15 |= 1;   /* set interpret mode */
 356         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 357
 358         /* execute CP15 instruction and ARM store (writing to coprocessor) */
 359         arm920t_execute_cp15(target, cp15_opcode, ARMV4_5_STR(0, 1));
 360
 361         /* disable interpreted access mode */
 362         cp15c15 &= ~1U; /* set interpret mode */
 363         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 364
 365 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 366         DEBUG("cp15_opcode: %8.8x, value: %8.8x, address: %8.8x", cp15_opcode, value, address);
 367 #endif
 368
 369         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = 1;
 370         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 1).dirty = 1;
 371
 372         return ERROR_OK;
 373 }
 374
 375 u32 arm920t_get_ttb(target_t *target)
 376 {
 377         int retval;
 378         u32 ttb = 0x0;
 379
 380         if ((retval = arm920t_read_cp15_interpreted(target, 0xeebf0f51, 0x0, &ttb)) != ERROR_OK)
 381                 return retval;
 382
 383         return ttb;
 384 }
 385
 386 void arm920t_disable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
 387 {
 388         u32 cp15_control;
 389
 390         /* read cp15 control register */
 391         arm920t_read_cp15_physical(target, 0x2, &cp15_control);
 392         jtag_execute_queue();
 393
 394         if (mmu)
 395                 cp15_control &= ~0x1U;
 396
 397         if (d_u_cache)
 398                 cp15_control &= ~0x4U;
 399
 400         if (i_cache)
 401                 cp15_control &= ~0x1000U;
 402
 403         arm920t_write_cp15_physical(target, 0x2, cp15_control);
 404 }
 405
 406 void arm920t_enable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
 407 {
 408         u32 cp15_control;
 409
 410         /* read cp15 control register */
 411         arm920t_read_cp15_physical(target, 0x2, &cp15_control);
 412         jtag_execute_queue();
 413
 414         if (mmu)
 415                 cp15_control |= 0x1U;
 416
 417         if (d_u_cache)
 418                 cp15_control |= 0x4U;
 419
 420         if (i_cache)
 421                 cp15_control |= 0x1000U;
 422
 423         arm920t_write_cp15_physical(target, 0x2, cp15_control);
 424 }
 425
 426 void arm920t_post_debug_entry(target_t *target)
 427 {
 428         u32 cp15c15;
 429         armv4_5_common_t *armv4_5 = target->arch_info;
 430         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 431         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 432         arm920t_common_t *arm920t = arm9tdmi->arch_info;
 433
 434         /* examine cp15 control reg */
 435         arm920t_read_cp15_physical(target, 0x2, &arm920t->cp15_control_reg);
 436         jtag_execute_queue();
 437         DEBUG("cp15_control_reg: %8.8x", arm920t->cp15_control_reg);
 438
 439         if (arm920t->armv4_5_mmu.armv4_5_cache.ctype == -1)
 440         {
 441                 u32 cache_type_reg;
 442                 /* identify caches */
 443                 arm920t_read_cp15_physical(target, 0x1, &cache_type_reg);
 444                 jtag_execute_queue();
 445                 armv4_5_identify_cache(cache_type_reg, &arm920t->armv4_5_mmu.armv4_5_cache);
 446         }
 447
 448         arm920t->armv4_5_mmu.mmu_enabled = (arm920t->cp15_control_reg & 0x1U) ? 1 : 0;
 449         arm920t->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (arm920t->cp15_control_reg & 0x4U) ? 1 : 0;
 450         arm920t->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (arm920t->cp15_control_reg & 0x1000U) ? 1 : 0;
 451
 452         /* save i/d fault status and address register */
 453         arm920t_read_cp15_interpreted(target, 0xee150f10, 0x0, &arm920t->d_fsr);
 454         arm920t_read_cp15_interpreted(target, 0xee150f30, 0x0, &arm920t->i_fsr);
 455         arm920t_read_cp15_interpreted(target, 0xee160f10, 0x0, &arm920t->d_far);
 456         arm920t_read_cp15_interpreted(target, 0xee160f30, 0x0, &arm920t->i_far);
 457
 458         if (arm920t->preserve_cache)
 459         {
 460                 /* read-modify-write CP15 test state register
 461                  * to disable I/D-cache linefills */
 462                 arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
 463                 jtag_execute_queue();
 464                 cp15c15 |= 0x600;
 465                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 466         }
 467 }
 468
 469 void arm920t_pre_restore_context(target_t *target)
 470 {
 471         u32 cp15c15;
 472         armv4_5_common_t *armv4_5 = target->arch_info;
 473         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 474         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 475         arm920t_common_t *arm920t = arm9tdmi->arch_info;
 476
 477         /* restore i/d fault status and address register */
 478         arm920t_write_cp15_interpreted(target, 0xee050f10, arm920t->d_fsr, 0x0);
 479         arm920t_write_cp15_interpreted(target, 0xee050f30, arm920t->i_fsr, 0x0);
 480         arm920t_write_cp15_interpreted(target, 0xee060f10, arm920t->d_far, 0x0);
 481         arm920t_write_cp15_interpreted(target, 0xee060f30, arm920t->i_far, 0x0);
 482
 483         /* read-modify-write CP15 test state register
 484         * to reenable I/D-cache linefills */
 485         if (arm920t->preserve_cache)
 486         {
 487                 arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
 488                 jtag_execute_queue();
 489                 cp15c15 &= ~0x600U;
 490                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 491         }
 492 }
 493
 494 int arm920t_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, arm7_9_common_t **arm7_9_p, arm9tdmi_common_t **arm9tdmi_p, arm920t_common_t **arm920t_p)
 495 {
 496         armv4_5_common_t *armv4_5 = target->arch_info;
 497         arm7_9_common_t *arm7_9;
 498         arm9tdmi_common_t *arm9tdmi;
 499         arm920t_common_t *arm920t;
 500
 501         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 502         {
 503                 return -1;
 504         }
 505
 506         arm7_9 = armv4_5->arch_info;
 507         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 508         {
 509                 return -1;
 510         }
 511
 512         arm9tdmi = arm7_9->arch_info;
 513         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 514         {
 515                 return -1;
 516         }
 517
 518         arm920t = arm9tdmi->arch_info;
 519         if (arm920t->common_magic != ARM920T_COMMON_MAGIC)
 520         {
 521                 return -1;
 522         }
 523
 524         *armv4_5_p = armv4_5;
 525         *arm7_9_p = arm7_9;
 526         *arm9tdmi_p = arm9tdmi;
 527         *arm920t_p = arm920t;
 528
 529         return ERROR_OK;
 530 }
 531
 532 int arm920t_arch_state(struct target_s *target, char *buf, int buf_size)
 533 {
 534         armv4_5_common_t *armv4_5 = target->arch_info;
 535         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 536         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 537         arm920t_common_t *arm920t = arm9tdmi->arch_info;
 538
 539         char *state[] =
 540         {
 541                 "disabled", "enabled"
 542         };
 543
 544         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 545         {
 546                 ERROR("BUG: called for a non-ARMv4/5 target");
 547                 exit(-1);
 548         }
 549
 550         snprintf(buf, buf_size,
 551                         "target halted in %s state due to %s, current mode: %s\n"
 552                         "cpsr: 0x%8.8x pc: 0x%8.8x\n"
 553                         "MMU: %s, D-Cache: %s, I-Cache: %s",
 554                          armv4_5_state_strings[armv4_5->core_state],
 555                          target_debug_reason_strings[target->debug_reason],
 556                          armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
 557                          buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
 558                          buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
 559                          state[arm920t->armv4_5_mmu.mmu_enabled],
 560                          state[arm920t->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
 561                          state[arm920t->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
 562
 563         return ERROR_OK;
 564 }
 565
 566 int arm920t_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
 567 {
 568         int retval;
 569
 570         retval = arm7_9_read_memory(target, address, size, count, buffer);
 571
 572         return retval;
 573 }
 574
 575 int arm920t_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
 576 {
 577         int retval;
 578         armv4_5_common_t *armv4_5 = target->arch_info;
 579         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 580         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 581         arm920t_common_t *arm920t = arm9tdmi->arch_info;
 582
 583         if ((retval = arm7_9_write_memory(target, address, size, count, buffer)) != ERROR_OK)
 584                 return retval;
 585
 586         if (((size == 4) || (size == 2)) && (count == 1))
 587         {
 588                 if (arm920t->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled)
 589                 {
 590                         DEBUG("D-Cache enabled, writing through to main memory");
 591                         u32 pa, cb, ap;
 592                         int type, domain;
 593
 594                         pa = armv4_5_mmu_translate_va(target, &arm920t->armv4_5_mmu, address, &type, &cb, &domain, &ap);
 595                         if (type == -1)
 596                                 return ERROR_OK;
 597                         /* cacheable & bufferable means write-back region */
 598                         if (cb == 3)
 599                                 armv4_5_mmu_write_physical(target, &arm920t->armv4_5_mmu, pa, size, count, buffer);
 600                 }
 601
 602                 if (arm920t->armv4_5_mmu.armv4_5_cache.i_cache_enabled)
 603                 {
 604                         DEBUG("I-Cache enabled, invalidating affected I-Cache line");
 605                         arm920t_write_cp15_interpreted(target, 0xee070f35, 0x0, address);
 606                 }
 607         }
 608
 609         return retval;
 610 }
 611
 612 int arm920t_soft_reset_halt(struct target_s *target)
 613 {
 614         armv4_5_common_t *armv4_5 = target->arch_info;
 615         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 616         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 617         arm920t_common_t *arm920t = arm9tdmi->arch_info;
 618         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 619
 620         if (target->state == TARGET_RUNNING)
 621         {
 622                 target->type->halt(target);
 623         }
 624
 625         while (buf_get_u32(dbg_stat->value, EICE_DBG_CONTROL_DBGACK, 1) == 0)
 626         {
 627                 embeddedice_read_reg(dbg_stat);
 628                 jtag_execute_queue();
 629         }
 630
 631         target->state = TARGET_HALTED;
 632
 633         /* SVC, ARM state, IRQ and FIQ disabled */
 634         buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8, 0xd3);
 635         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
 636         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
 637
 638         /* start fetching from 0x0 */
 639         buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, 0x0);
 640         armv4_5->core_cache->reg_list[15].dirty = 1;
 641         armv4_5->core_cache->reg_list[15].valid = 1;
 642
 643         armv4_5->core_mode = ARMV4_5_MODE_SVC;
 644         armv4_5->core_state = ARMV4_5_STATE_ARM;
 645
 646         arm920t_disable_mmu_caches(target, 1, 1, 1);
 647         arm920t->armv4_5_mmu.mmu_enabled = 0;
 648         arm920t->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0;
 649         arm920t->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
 650
 651         target_call_event_callbacks(target, TARGET_EVENT_HALTED);
 652
 653         return ERROR_OK;
 654 }
 655
 656 int arm920t_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
 657 {
 658         arm9tdmi_init_target(cmd_ctx, target);
 659
 660         return ERROR_OK;
 661
 662 }
 663
 664 int arm920t_quit()
 665 {
 666
 667         return ERROR_OK;
 668 }
 669
 670 int arm920t_init_arch_info(target_t *target, arm920t_common_t *arm920t, int chain_pos, char *variant)
 671 {
 672         arm9tdmi_common_t *arm9tdmi = &arm920t->arm9tdmi_common;
 673         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
 674
 675         /* initialize arm9tdmi specific info (including arm7_9 and armv4_5)
 676          */
 677         arm9tdmi_init_arch_info(target, arm9tdmi, chain_pos, variant);
 678
 679         arm9tdmi->arch_info = arm920t;
 680         arm920t->common_magic = ARM920T_COMMON_MAGIC;
 681
 682         arm7_9->post_debug_entry = arm920t_post_debug_entry;
 683         arm7_9->pre_restore_context = arm920t_pre_restore_context;
 684
 685         arm920t->armv4_5_mmu.armv4_5_cache.ctype = -1;
 686         arm920t->armv4_5_mmu.get_ttb = arm920t_get_ttb;
 687         arm920t->armv4_5_mmu.read_memory = arm7_9_read_memory;
 688         arm920t->armv4_5_mmu.write_memory = arm7_9_write_memory;
 689         arm920t->armv4_5_mmu.disable_mmu_caches = arm920t_disable_mmu_caches;
 690         arm920t->armv4_5_mmu.enable_mmu_caches = arm920t_enable_mmu_caches;
 691         arm920t->armv4_5_mmu.has_tiny_pages = 1;
 692         arm920t->armv4_5_mmu.mmu_enabled = 0;
 693
 694         /* disabling linefills leads to lockups, so keep them enabled for now
 695          * this doesn't affect correctness, but might affect timing issues, if
 696          * important data is evicted from the cache during the debug session
 697          * */
 698         arm920t->preserve_cache = 0;
 699
 700         /* override hw single-step capability from ARM9TDMI */
 701         arm9tdmi->has_single_step = 1;
 702
 703         return ERROR_OK;
 704 }
 705
 706 int arm920t_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
 707 {
 708         int chain_pos;
 709         char *variant = NULL;
 710         arm920t_common_t *arm920t = malloc(sizeof(arm920t_common_t));
 711
 712         if (argc < 4)
 713         {
 714                 ERROR("'target arm920t' requires at least one additional argument");
 715                 exit(-1);
 716         }
 717
 718         chain_pos = strtoul(args[3], NULL, 0);
 719
 720         if (argc >= 5)
 721                 variant = args[4];
 722
 723         DEBUG("chain_pos: %i, variant: %s", chain_pos, variant);
 724
 725         arm920t_init_arch_info(target, arm920t, chain_pos, variant);
 726
 727         return ERROR_OK;
 728 }
 729
 730 int arm920t_register_commands(struct command_context_s *cmd_ctx)
 731 {
 732         int retval;
 733         command_t *arm920t_cmd;
 734
 735
 736         retval = arm9tdmi_register_commands(cmd_ctx);
 737
 738         arm920t_cmd = register_command(cmd_ctx, NULL, "arm920t", NULL, COMMAND_ANY, "arm920t specific commands");
 739
 740         register_command(cmd_ctx, arm920t_cmd, "cp15", arm920t_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <num> [value]");
 741         register_command(cmd_ctx, arm920t_cmd, "cp15i", arm920t_handle_cp15i_command, COMMAND_EXEC, "display/modify cp15 (interpreted access) <opcode> [value] [address]");
 742         register_command(cmd_ctx, arm920t_cmd, "cache_info", arm920t_handle_cache_info_command, COMMAND_EXEC, "display information about target caches");
 743         register_command(cmd_ctx, arm920t_cmd, "virt2phys", arm920t_handle_virt2phys_command, COMMAND_EXEC, "translate va to pa <va>");
 744
 745         register_command(cmd_ctx, arm920t_cmd, "mdw_phys", arm920t_handle_md_phys_command, COMMAND_EXEC, "display memory words <physical addr> [count]");
 746         register_command(cmd_ctx, arm920t_cmd, "mdh_phys", arm920t_handle_md_phys_command, COMMAND_EXEC, "display memory half-words <physical addr> [count]");
 747         register_command(cmd_ctx, arm920t_cmd, "mdb_phys", arm920t_handle_md_phys_command, COMMAND_EXEC, "display memory bytes <physical addr> [count]");
 748
 749         register_command(cmd_ctx, arm920t_cmd, "mww_phys", arm920t_handle_mw_phys_command, COMMAND_EXEC, "write memory word <physical addr> <value>");
 750         register_command(cmd_ctx, arm920t_cmd, "mwh_phys", arm920t_handle_mw_phys_command, COMMAND_EXEC, "write memory half-word <physical addr> <value>");
 751         register_command(cmd_ctx, arm920t_cmd, "mwb_phys", arm920t_handle_mw_phys_command, COMMAND_EXEC, "write memory byte <physical addr> <value>");
 752
 753         register_command(cmd_ctx, arm920t_cmd, "read_cache", arm920t_handle_read_cache_command, COMMAND_EXEC, "display I/D cache content");
 754         register_command(cmd_ctx, arm920t_cmd, "read_mmu", arm920t_handle_read_mmu_command, COMMAND_EXEC, "display I/D mmu content");
 755
 756         return ERROR_OK;
 757 }
 758
 759 int arm920t_handle_read_cache_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 760 {
 761         target_t *target = get_current_target(cmd_ctx);
 762         armv4_5_common_t *armv4_5;
 763         arm7_9_common_t *arm7_9;
 764         arm9tdmi_common_t *arm9tdmi;
 765         arm920t_common_t *arm920t;
 766         arm_jtag_t *jtag_info;
 767         u32 cp15c15;
 768         u32 cp15_ctrl, cp15_ctrl_saved;
 769         u32 regs[16];
 770         u32 *regs_p[16];
 771         u32 C15_C_D_Ind, C15_C_I_Ind;
 772         int i;
 773         FILE *output;
 774         arm920t_cache_line_t d_cache[8][64], i_cache[8][64];
 775         int segment, index;
 776
 777         if (argc != 1)
 778         {
 779                 command_print(cmd_ctx, "usage: arm920t read_cache <filename>");
 780                 return ERROR_OK;
 781         }
 782
 783         if ((output = fopen(args[0], "w")) == NULL)
 784         {
 785                 DEBUG("error opening cache content file");
 786                 return ERROR_OK;
 787         }
 788
 789         for (i = 0; i < 16; i++)
 790                 regs_p[i] = &regs[i];
 791
 792         if (arm920t_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm920t) != ERROR_OK)
 793         {
 794                 command_print(cmd_ctx, "current target isn't an ARM920t target");
 795                 return ERROR_OK;
 796         }
 797
 798         jtag_info = &arm7_9->jtag_info;
 799
 800         /* disable MMU and Caches */
 801         arm920t_read_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), &cp15_ctrl);
 802         jtag_execute_queue();
 803         cp15_ctrl_saved = cp15_ctrl;
 804         cp15_ctrl &= ~(ARMV4_5_MMU_ENABLED | ARMV4_5_D_U_CACHE_ENABLED | ARMV4_5_I_CACHE_ENABLED);
 805         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), cp15_ctrl);
 806
 807         /* read CP15 test state register */
 808         arm920t_read_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), &cp15c15);
 809         jtag_execute_queue();
 810
 811         /* read DCache content */
 812         fprintf(output, "DCache:\n");
 813
 814         /* go through segments 0 to nsets (8 on ARM920T, 4 on ARM922T) */
 815         for (segment = 0; segment < arm920t->armv4_5_mmu.armv4_5_cache.d_u_size.nsets; segment++)
 816         {
 817                 fprintf(output, "\nsegment: %i\n----------", segment);
 818
 819                 /* Ra: r0 = SBZ(31:8):segment(7:5):SBZ(4:0) */
 820                 regs[0] = 0x0 | (segment << 5);
 821                 arm9tdmi_write_core_regs(target, 0x1, regs);
 822
 823                 /* set interpret mode */
 824                 cp15c15 |= 0x1;
 825                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
 826
 827                 /* D CAM Read, loads current victim into C15.C.D.Ind */
 828                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,6,2), ARMV4_5_LDR(1, 0));
 829
 830                 /* read current victim */
 831                 arm920t_read_cp15_physical(target, 0x3d, &C15_C_D_Ind);
 832
 833                 /* clear interpret mode */
 834                 cp15c15 &= ~0x1;
 835                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 836
 837                 for (index = 0; index < 64; index++)
 838                 {
 839                         /* Ra: r0 = index(31:26):SBZ(25:8):segment(7:5):SBZ(4:0) */
 840                         regs[0] = 0x0 | (segment << 5) | (index << 26);
 841                         arm9tdmi_write_core_regs(target, 0x1, regs);
 842
 843                         /* set interpret mode */
 844                         cp15c15 |= 0x1;
 845                         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
 846
 847                         /* Write DCache victim */
 848                         arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,9,1,0), ARMV4_5_LDR(1, 0));
 849
 850                         /* Read D RAM */
 851                         arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,10,2), ARMV4_5_LDMIA(0, 0x1fe, 0, 0));
 852
 853                         /* Read D CAM */
 854                         arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,6,2), ARMV4_5_LDR(9, 0));
 855
 856                         /* clear interpret mode */
 857                         cp15c15 &= ~0x1;
 858                         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 859
 860                         /* read D RAM and CAM content */
 861                         arm9tdmi_read_core_regs(target, 0x3fe, regs_p);
 862                         jtag_execute_queue();
 863
 864                         d_cache[segment][index].cam = regs[9];
 865
 866                         /* mask LFSR[6] */
 867                         regs[9] &= 0xfffffffe;
 868                         fprintf(output, "\nsegment: %i, index: %i, CAM: 0x%8.8x, content (%s):\n", segment, index, regs[9], (regs[9] & 0x10) ? "valid" : "invalid");
 869
 870                         for (i = 1; i < 9; i++)
 871                         {
 872                                  d_cache[segment][index].data[i] = regs[i];
 873                                  fprintf(output, "%i: 0x%8.8x\n", i-1, regs[i]);
 874                         }
 875
 876                 }
 877
 878                 /* Ra: r0 = index(31:26):SBZ(25:8):segment(7:5):SBZ(4:0) */
 879                 regs[0] = 0x0 | (segment << 5) | (C15_C_D_Ind << 26);
 880                 arm9tdmi_write_core_regs(target, 0x1, regs);
 881
 882                 /* set interpret mode */
 883                 cp15c15 |= 0x1;
 884                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
 885
 886                 /* Write DCache victim */
 887                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,9,1,0), ARMV4_5_LDR(1, 0));
 888
 889                 /* clear interpret mode */
 890                 cp15c15 &= ~0x1;
 891                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 892         }
 893
 894         /* read ICache content */
 895         fprintf(output, "ICache:\n");
 896
 897         /* go through segments 0 to nsets (8 on ARM920T, 4 on ARM922T) */
 898         for (segment = 0; segment < arm920t->armv4_5_mmu.armv4_5_cache.d_u_size.nsets; segment++)
 899         {
 900                 fprintf(output, "segment: %i\n----------", segment);
 901
 902                 /* Ra: r0 = SBZ(31:8):segment(7:5):SBZ(4:0) */
 903                 regs[0] = 0x0 | (segment << 5);
 904                 arm9tdmi_write_core_regs(target, 0x1, regs);
 905
 906                 /* set interpret mode */
 907                 cp15c15 |= 0x1;
 908                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
 909
 910                 /* I CAM Read, loads current victim into C15.C.I.Ind */
 911                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,5,2), ARMV4_5_LDR(1, 0));
 912
 913                 /* read current victim */
 914                 arm920t_read_cp15_physical(target, 0x3b, &C15_C_I_Ind);
 915
 916                 /* clear interpret mode */
 917                 cp15c15 &= ~0x1;
 918                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 919
 920                 for (index = 0; index < 64; index++)
 921                 {
 922                         /* Ra: r0 = index(31:26):SBZ(25:8):segment(7:5):SBZ(4:0) */
 923                         regs[0] = 0x0 | (segment << 5) | (index << 26);
 924                         arm9tdmi_write_core_regs(target, 0x1, regs);
 925
 926                         /* set interpret mode */
 927                         cp15c15 |= 0x1;
 928                         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
 929
 930                         /* Write ICache victim */
 931                         arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,9,1,1), ARMV4_5_LDR(1, 0));
 932
 933                         /* Read I RAM */
 934                         arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,9,2), ARMV4_5_LDMIA(0, 0x1fe, 0, 0));
 935
 936                         /* Read I CAM */
 937                         arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,5,2), ARMV4_5_LDR(9, 0));
 938
 939                         /* clear interpret mode */
 940                         cp15c15 &= ~0x1;
 941                         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 942
 943                         /* read I RAM and CAM content */
 944                         arm9tdmi_read_core_regs(target, 0x3fe, regs_p);
 945                         jtag_execute_queue();
 946
 947                         i_cache[segment][index].cam = regs[9];
 948
 949                         /* mask LFSR[6] */
 950                         regs[9] &= 0xfffffffe;
 951                         fprintf(output, "\nsegment: %i, index: %i, CAM: 0x%8.8x, content (%s):\n", segment, index, regs[9], (regs[9] & 0x10) ? "valid" : "invalid");
 952
 953                         for (i = 1; i < 9; i++)
 954                         {
 955                                  i_cache[segment][index].data[i] = regs[i];
 956                                  fprintf(output, "%i: 0x%8.8x\n", i-1, regs[i]);
 957                         }
 958
 959                 }
 960
 961
 962                 /* Ra: r0 = index(31:26):SBZ(25:8):segment(7:5):SBZ(4:0) */
 963                 regs[0] = 0x0 | (segment << 5) | (C15_C_D_Ind << 26);
 964                 arm9tdmi_write_core_regs(target, 0x1, regs);
 965
 966                 /* set interpret mode */
 967                 cp15c15 |= 0x1;
 968                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
 969
 970                 /* Write ICache victim */
 971                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,9,1,1), ARMV4_5_LDR(1, 0));
 972
 973                 /* clear interpret mode */
 974                 cp15c15 &= ~0x1;
 975                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 976         }
 977
 978         /* restore CP15 MMU and Cache settings */
 979         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), cp15_ctrl_saved);
 980
 981         command_print(cmd_ctx, "cache content successfully output to %s", args[0]);
 982
 983         fclose(output);
 984
 985         /* mark registers dirty */
 986         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = 1;
 987         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 1).dirty = 1;
 988         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 2).dirty = 1;
 989         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 3).dirty = 1;
 990         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 4).dirty = 1;
 991         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 5).dirty = 1;
 992         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 6).dirty = 1;
 993         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 7).dirty = 1;
 994         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 8).dirty = 1;
 995         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 9).dirty = 1;
 996
 997         return ERROR_OK;
 998 }
 999
1000 int arm920t_handle_read_mmu_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1001 {
1002         target_t *target = get_current_target(cmd_ctx);
1003         armv4_5_common_t *armv4_5;
1004         arm7_9_common_t *arm7_9;
1005         arm9tdmi_common_t *arm9tdmi;
1006         arm920t_common_t *arm920t;
1007         arm_jtag_t *jtag_info;
1008         u32 cp15c15;
1009         u32 cp15_ctrl, cp15_ctrl_saved;
1010         u32 regs[16];
1011         u32 *regs_p[16];
1012         int i;
1013         FILE *output;
1014         u32 Dlockdown, Ilockdown;
1015         arm920t_tlb_entry_t d_tlb[64], i_tlb[64];
1016         int victim;
1017
1018         if (argc != 1)
1019         {
1020                 command_print(cmd_ctx, "usage: arm920t read_mmu <filename>");
1021                 return ERROR_OK;
1022         }
1023
1024         if ((output = fopen(args[0], "w")) == NULL)
1025         {
1026                 DEBUG("error opening mmu content file");
1027                 return ERROR_OK;
1028         }
1029
1030         for (i = 0; i < 16; i++)
1031                 regs_p[i] = &regs[i];
1032
1033         if (arm920t_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm920t) != ERROR_OK)
1034         {
1035                 command_print(cmd_ctx, "current target isn't an ARM920t target");
1036                 return ERROR_OK;
1037         }
1038
1039         jtag_info = &arm7_9->jtag_info;
1040
1041         /* disable MMU and Caches */
1042         arm920t_read_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), &cp15_ctrl);
1043         jtag_execute_queue();
1044         cp15_ctrl_saved = cp15_ctrl;
1045         cp15_ctrl &= ~(ARMV4_5_MMU_ENABLED | ARMV4_5_D_U_CACHE_ENABLED | ARMV4_5_I_CACHE_ENABLED);
1046         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), cp15_ctrl);
1047
1048         /* read CP15 test state register */
1049         arm920t_read_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), &cp15c15);
1050         jtag_execute_queue();
1051
1052         /* prepare reading D TLB content
1053          * */
1054
1055         /* set interpret mode */
1056         cp15c15 |= 0x1;
1057         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
1058
1059         /* Read D TLB lockdown */
1060         arm920t_execute_cp15(target, ARMV4_5_MRC(15,0,0,10,0,0), ARMV4_5_LDR(1, 0));
1061
1062         /* clear interpret mode */
1063         cp15c15 &= ~0x1;
1064         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
1065
1066         /* read D TLB lockdown stored to r1 */
1067         arm9tdmi_read_core_regs(target, 0x2, regs_p);
1068         jtag_execute_queue();
1069         Dlockdown = regs[1];
1070
1071         for (victim = 0; victim < 64; victim += 8)
1072         {
1073                 /* new lockdown value: base[31:26]:victim[25:20]:SBZ[19:1]:p[0]
1074                  * base remains unchanged, victim goes through entries 0 to 63 */
1075                 regs[1] = (Dlockdown & 0xfc000000) | (victim << 20);
1076                 arm9tdmi_write_core_regs(target, 0x2, regs);
1077
1078                 /* set interpret mode */
1079                 cp15c15 |= 0x1;
1080                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
1081
1082                 /* Write D TLB lockdown */
1083                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,0), ARMV4_5_STR(1, 0));
1084
1085                 /* Read D TLB CAM */
1086                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,6,4), ARMV4_5_LDMIA(0, 0x3fc, 0, 0));
1087
1088                 /* clear interpret mode */
1089                 cp15c15 &= ~0x1;
1090                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
1091
1092                 /* read D TLB CAM content stored to r2-r9 */
1093                 arm9tdmi_read_core_regs(target, 0x3fc, regs_p);
1094                 jtag_execute_queue();
1095
1096                 for (i = 0; i < 8; i++)
1097                         d_tlb[victim + i].cam = regs[i + 2];
1098         }
1099
1100         for (victim = 0; victim < 64; victim++)
1101         {
1102                 /* new lockdown value: base[31:26]:victim[25:20]:SBZ[19:1]:p[0]
1103                  * base remains unchanged, victim goes through entries 0 to 63 */
1104                 regs[1] = (Dlockdown & 0xfc000000) | (victim << 20);
1105                 arm9tdmi_write_core_regs(target, 0x2, regs);
1106
1107                 /* set interpret mode */
1108                 cp15c15 |= 0x1;
1109                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
1110
1111                 /* Write D TLB lockdown */
1112                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,0), ARMV4_5_STR(1, 0));
1113
1114                 /* Read D TLB RAM1 */
1115                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,10,4), ARMV4_5_LDR(2,0));
1116
1117                 /* Read D TLB RAM2 */
1118                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,2,5), ARMV4_5_LDR(3,0));
1119
1120                 /* clear interpret mode */
1121                 cp15c15 &= ~0x1;
1122                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
1123
1124                 /* read D TLB RAM content stored to r2 and r3 */
1125                 arm9tdmi_read_core_regs(target, 0xc, regs_p);
1126                 jtag_execute_queue();
1127
1128                 d_tlb[victim].ram1 = regs[2];
1129                 d_tlb[victim].ram2 = regs[3];
1130         }
1131
1132         /* restore D TLB lockdown */
1133         regs[1] = Dlockdown;
1134         arm9tdmi_write_core_regs(target, 0x2, regs);
1135
1136         /* Write D TLB lockdown */
1137         arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,0), ARMV4_5_STR(1, 0));
1138
1139         /* prepare reading I TLB content
1140          * */
1141
1142         /* set interpret mode */
1143         cp15c15 |= 0x1;
1144         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
1145
1146         /* Read I TLB lockdown */
1147         arm920t_execute_cp15(target, ARMV4_5_MRC(15,0,0,10,0,1), ARMV4_5_LDR(1, 0));
1148
1149         /* clear interpret mode */
1150         cp15c15 &= ~0x1;
1151         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
1152
1153         /* read I TLB lockdown stored to r1 */
1154         arm9tdmi_read_core_regs(target, 0x2, regs_p);
1155         jtag_execute_queue();
1156         Ilockdown = regs[1];
1157
1158         for (victim = 0; victim < 64; victim += 8)
1159         {
1160                 /* new lockdown value: base[31:26]:victim[25:20]:SBZ[19:1]:p[0]
1161                  * base remains unchanged, victim goes through entries 0 to 63 */
1162                 regs[1] = (Ilockdown & 0xfc000000) | (victim << 20);
1163                 arm9tdmi_write_core_regs(target, 0x2, regs);
1164
1165                 /* set interpret mode */
1166                 cp15c15 |= 0x1;
1167                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
1168
1169                 /* Write I TLB lockdown */
1170                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,1), ARMV4_5_STR(1, 0));
1171
1172                 /* Read I TLB CAM */
1173                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,5,4), ARMV4_5_LDMIA(0, 0x3fc, 0, 0));
1174
1175                 /* clear interpret mode */
1176                 cp15c15 &= ~0x1;
1177                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
1178
1179                 /* read I TLB CAM content stored to r2-r9 */
1180                 arm9tdmi_read_core_regs(target, 0x3fc, regs_p);
1181                 jtag_execute_queue();
1182
1183                 for (i = 0; i < 8; i++)
1184                         i_tlb[i + victim].cam = regs[i + 2];
1185         }
1186
1187         for (victim = 0; victim < 64; victim++)
1188         {
1189                 /* new lockdown value: base[31:26]:victim[25:20]:SBZ[19:1]:p[0]
1190                  * base remains unchanged, victim goes through entries 0 to 63 */
1191                 regs[1] = (Dlockdown & 0xfc000000) | (victim << 20);
1192                 arm9tdmi_write_core_regs(target, 0x2, regs);
1193
1194                 /* set interpret mode */
1195                 cp15c15 |= 0x1;
1196                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
1197
1198                 /* Write I TLB lockdown */
1199                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,1), ARMV4_5_STR(1, 0));
1200
1201                 /* Read I TLB RAM1 */
1202                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,9,4), ARMV4_5_LDR(2,0));
1203
1204                 /* Read I TLB RAM2 */
1205                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,1,5), ARMV4_5_LDR(3,0));
1206
1207                 /* clear interpret mode */
1208                 cp15c15 &= ~0x1;
1209                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
1210
1211                 /* read I TLB RAM content stored to r2 and r3 */
1212                 arm9tdmi_read_core_regs(target, 0xc, regs_p);
1213                 jtag_execute_queue();
1214
1215                 i_tlb[victim].ram1 = regs[2];
1216                 i_tlb[victim].ram2 = regs[3];
1217         }
1218
1219         /* restore I TLB lockdown */
1220         regs[1] = Ilockdown;
1221         arm9tdmi_write_core_regs(target, 0x2, regs);
1222
1223         /* Write I TLB lockdown */
1224         arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,1), ARMV4_5_STR(1, 0));
1225
1226         /* restore CP15 MMU and Cache settings */
1227         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), cp15_ctrl_saved);
1228
1229         /* output data to file */
1230         fprintf(output, "D TLB content:\n");
1231         for (i = 0; i < 64; i++)
1232         {
1233                 fprintf(output, "%i: 0x%8.8x 0x%8.8x 0x%8.8x %s\n", i, d_tlb[i].cam, d_tlb[i].ram1, d_tlb[i].ram2, (d_tlb[i].cam & 0x20) ? "(valid)" : "(invalid)");
1234         }
1235
1236         fprintf(output, "\n\nI TLB content:\n");
1237         for (i = 0; i < 64; i++)
1238         {
1239                 fprintf(output, "%i: 0x%8.8x 0x%8.8x 0x%8.8x %s\n", i, i_tlb[i].cam, i_tlb[i].ram1, i_tlb[i].ram2, (i_tlb[i].cam & 0x20) ? "(valid)" : "(invalid)");
1240         }
1241
1242         command_print(cmd_ctx, "mmu content successfully output to %s", args[0]);
1243
1244         fclose(output);
1245
1246         /* mark registers dirty */
1247         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = 1;
1248         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 1).dirty = 1;
1249         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 2).dirty = 1;
1250         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 3).dirty = 1;
1251         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 4).dirty = 1;
1252         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 5).dirty = 1;
1253         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 6).dirty = 1;
1254         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 7).dirty = 1;
1255         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 8).dirty = 1;
1256         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 9).dirty = 1;
1257
1258         return ERROR_OK;
1259 }
1260 int arm920t_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1261 {
1262         int retval;
1263         target_t *target = get_current_target(cmd_ctx);
1264         armv4_5_common_t *armv4_5;
1265         arm7_9_common_t *arm7_9;
1266         arm9tdmi_common_t *arm9tdmi;
1267         arm920t_common_t *arm920t;
1268         arm_jtag_t *jtag_info;
1269
1270         if (arm920t_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm920t) != ERROR_OK)
1271         {
1272                 command_print(cmd_ctx, "current target isn't an ARM920t target");
1273                 return ERROR_OK;
1274         }
1275
1276         jtag_info = &arm7_9->jtag_info;
1277
1278         if (target->state != TARGET_HALTED)
1279         {
1280                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
1281                 return ERROR_OK;
1282         }
1283
1284         /* one or more argument, access a single register (write if second argument is given */
1285         if (argc >= 1)
1286         {
1287                 int address = strtoul(args[0], NULL, 0);
1288
1289                 if (argc == 1)
1290                 {
1291                         u32 value;
1292                         if ((retval = arm920t_read_cp15_physical(target, address, &value)) != ERROR_OK)
1293                         {
1294                                 command_print(cmd_ctx, "couldn't access reg %i", address);
1295                                 return ERROR_OK;
1296                         }
1297                         jtag_execute_queue();
1298
1299                         command_print(cmd_ctx, "%i: %8.8x", address, value);
1300                 }
1301                 else if (argc == 2)
1302                 {
1303                         u32 value = strtoul(args[1], NULL, 0);
1304                         if ((retval = arm920t_write_cp15_physical(target, address, value)) != ERROR_OK)
1305                         {
1306                                 command_print(cmd_ctx, "couldn't access reg %i", address);
1307                                 return ERROR_OK;
1308                         }
1309                         command_print(cmd_ctx, "%i: %8.8x", address, value);
1310                 }
1311         }
1312
1313         return ERROR_OK;
1314 }
1315
1316 int arm920t_handle_cp15i_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1317 {
1318         int retval;
1319         target_t *target = get_current_target(cmd_ctx);
1320         armv4_5_common_t *armv4_5;
1321         arm7_9_common_t *arm7_9;
1322         arm9tdmi_common_t *arm9tdmi;
1323         arm920t_common_t *arm920t;
1324         arm_jtag_t *jtag_info;
1325
1326         if (arm920t_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm920t) != ERROR_OK)
1327         {
1328                 command_print(cmd_ctx, "current target isn't an ARM920t target");
1329                 return ERROR_OK;
1330         }
1331
1332         jtag_info = &arm7_9->jtag_info;
1333
1334         if (target->state != TARGET_HALTED)
1335         {
1336                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
1337                 return ERROR_OK;
1338         }
1339
1340         /* one or more argument, access a single register (write if second argument is given */
1341         if (argc >= 1)
1342         {
1343                 u32 opcode = strtoul(args[0], NULL, 0);
1344
1345                 if (argc == 1)
1346                 {
1347                         u32 value;
1348                         if ((retval = arm920t_read_cp15_interpreted(target, opcode, 0x0, &value)) != ERROR_OK)
1349                         {
1350                                 command_print(cmd_ctx, "couldn't execute %8.8x", opcode);
1351                                 return ERROR_OK;
1352                         }
1353
1354                         command_print(cmd_ctx, "%8.8x: %8.8x", opcode, value);
1355                 }
1356                 else if (argc == 2)
1357                 {
1358                         u32 value = strtoul(args[1], NULL, 0);
1359                         if ((retval = arm920t_write_cp15_interpreted(target, opcode, value, 0)) != ERROR_OK)
1360                         {
1361                                 command_print(cmd_ctx, "couldn't execute %8.8x", opcode);
1362                                 return ERROR_OK;
1363                         }
1364                         command_print(cmd_ctx, "%8.8x: %8.8x", opcode, value);
1365                 }
1366                 else if (argc == 3)
1367                 {
1368                         u32 value = strtoul(args[1], NULL, 0);
1369                         u32 address = strtoul(args[2], NULL, 0);
1370                         if ((retval = arm920t_write_cp15_interpreted(target, opcode, value, address)) != ERROR_OK)
1371                         {
1372                                 command_print(cmd_ctx, "couldn't execute %8.8x", opcode);
1373                                 return ERROR_OK;
1374                         }
1375                         command_print(cmd_ctx, "%8.8x: %8.8x %8.8x", opcode, value, address);
1376                 }
1377         }
1378         else
1379         {
1380                 command_print(cmd_ctx, "usage: arm920t cp15i <opcode> [value] [address]");
1381         }
1382
1383         return ERROR_OK;
1384 }
1385
1386 int arm920t_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1387 {
1388         target_t *target = get_current_target(cmd_ctx);
1389         armv4_5_common_t *armv4_5;
1390         arm7_9_common_t *arm7_9;
1391         arm9tdmi_common_t *arm9tdmi;
1392         arm920t_common_t *arm920t;
1393
1394         if (arm920t_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm920t) != ERROR_OK)
1395         {
1396                 command_print(cmd_ctx, "current target isn't an ARM920t target");
1397                 return ERROR_OK;
1398         }
1399
1400         return armv4_5_handle_cache_info_command(cmd_ctx, &arm920t->armv4_5_mmu.armv4_5_cache);
1401 }
1402
1403 int arm920t_handle_virt2phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
1404 {
1405         target_t *target = get_current_target(cmd_ctx);
1406         armv4_5_common_t *armv4_5;
1407         arm7_9_common_t *arm7_9;
1408         arm9tdmi_common_t *arm9tdmi;
1409         arm920t_common_t *arm920t;
1410         arm_jtag_t *jtag_info;
1411
1412         if (arm920t_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm920t) != ERROR_OK)
1413         {
1414                 command_print(cmd_ctx, "current target isn't an ARM920t target");
1415                 return ERROR_OK;
1416         }
1417
1418         jtag_info = &arm7_9->jtag_info;
1419
1420         if (target->state != TARGET_HALTED)
1421         {
1422                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
1423                 return ERROR_OK;
1424         }
1425
1426         return armv4_5_mmu_handle_virt2phys_command(cmd_ctx, cmd, args, argc, target, &arm920t->armv4_5_mmu);
1427 }
1428
1429 int arm920t_handle_md_phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
1430 {
1431         target_t *target = get_current_target(cmd_ctx);
1432         armv4_5_common_t *armv4_5;
1433         arm7_9_common_t *arm7_9;
1434         arm9tdmi_common_t *arm9tdmi;
1435         arm920t_common_t *arm920t;
1436         arm_jtag_t *jtag_info;
1437
1438         if (arm920t_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm920t) != ERROR_OK)
1439         {
1440                 command_print(cmd_ctx, "current target isn't an ARM920t target");
1441                 return ERROR_OK;
1442         }
1443
1444         jtag_info = &arm7_9->jtag_info;
1445
1446         if (target->state != TARGET_HALTED)
1447         {
1448                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
1449                 return ERROR_OK;
1450         }
1451
1452         return armv4_5_mmu_handle_md_phys_command(cmd_ctx, cmd, args, argc, target, &arm920t->armv4_5_mmu);
1453 }
1454
1455 int arm920t_handle_mw_phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
1456 {
1457         target_t *target = get_current_target(cmd_ctx);
1458         armv4_5_common_t *armv4_5;
1459         arm7_9_common_t *arm7_9;
1460         arm9tdmi_common_t *arm9tdmi;
1461         arm920t_common_t *arm920t;
1462         arm_jtag_t *jtag_info;
1463
1464         if (arm920t_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm920t) != ERROR_OK)
1465         {
1466                 command_print(cmd_ctx, "current target isn't an ARM920t target");
1467                 return ERROR_OK;
1468         }
1469
1470         jtag_info = &arm7_9->jtag_info;
1471
1472         if (target->state != TARGET_HALTED)
1473         {
1474                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
1475                 return ERROR_OK;
1476         }
1477
1478         return armv4_5_mmu_handle_mw_phys_command(cmd_ctx, cmd, args, argc, target, &arm920t->armv4_5_mmu);
1479 }